This famous city eluded concrete detection until the early 2000's.

One of the largest Roman settlements in Portugal.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

1,500 Commonwealth servicemen of World War II are buried or commemorated in this cemetery.

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

A sprawling collection of books and manuscripts about ancient Greece that would have put their famed libraries to shame.

This open air archeological site houses almost as much wildlife as it does classical religious artifacts.

Large collection from the 3rd millennium BCE.

Where commuters walk through remnants of an ancient Greek necropolis.

This famous archeological mystery may be an ancient example of movable type.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Hideout of thieves, monks, and goat-footed gods.

Ancient Greek oracle of the dead.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

Ever loyal to Roma, the small village of Albe in the Abruzzo region carried on until an earthquake did it in.

One of the earliest relics of Italian art is this ornately equipped stone soldier.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.